4. Work Sans

Work Sans in action

Work Sans (9 styles) — A typeface family based loosely on early Grotesques. The Regular weight and others in the middle of the family are optimized for on-screen text usage at medium-sizes and can also be used in print design.

6. Muli

Muli in action

Muli (14 styles) — A minimalist sans-serif that is designed mainly for use as a display font but is useable as a text font too. Muli has been designed to be used freely across the internet by web browsers on desktop computers, laptops and mobile devices.

Bonus: Open Sans

Because you are awesome, here is a bonus font:

Open Sans in action

Open Sans (10 styles) — A humanist sans-serif with open forms and a neutral, yet friendly appearance. It was optimized for print, web, and mobile interfaces, and has excellent legibility characteristics in its letterforms.